HEAD TO YOKOHAMA 99
After the opening cutscene, leave the school to get a call from Kaito.
You will get the Buzz Researcher App and the Noise Amp.
USE GADGETS TO FIND THE ARACHNID MAN
Open the Buzz Researcher App on your phone.
Search by Keyword: Arachnid Man
Go to the indicated location.
You'll discover and start Side Case: The Falling Man
After you solved the case, return to Yokohama 99.
GO TO PLAGE
Go to the Plage Restaurant and defeat the masked men.
In Quick Search Mode:
- Examine the shirt
- Examine his face
- Examine his hands / arms - both of them
- Examine the rubble in the back
Then, defeat Kuwana.
After the cutscene, you get the "Extracting the Past" Side Case.
TALK TO TSUKUMO
Go back to Yokohama 99 and talk to Tsukumo.